1  /*
     2   * Copyright the original author or authors.
     3   * 
     4   * Licensed under the MOZILLA PUBLIC LICENSE, Version 1.1 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   * 
     8   *      http://www.mozilla.org/MPL/MPL-1.1.html
     9   * 
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16   
    17  import org.as2lib.regexp.node.Node; 
    18  import org.as2lib.regexp.node.TreeInfo;
    19  
    20  /**
    21   * {@code Category} is a node class that matches a Unicode category.
    22   * 
    23   * @author Igor Sadovskiy
    24   */
    25   
    26  class org.as2lib.regexp.node.Category extends Node {
    27      
    28     	private var atype:Number;
    29      
    30      public function Category(type:Number) {
    31          atype = type;
    32      }
    33      
    34      public function dup(flag:Boolean):Node {
    35          return new Category(flag ? ~atype : atype);
    36      }
    37      
    38      public function match(matcher:Object, i:Number, seq:String):Boolean {
    39          return i < matcher.to
    40              && (atype & (1 << 0)) != 0
    41              && next.match(matcher, i+1, seq);
    42      }
    43      
    44      public function study(info:TreeInfo):Boolean {
    45          info.minLength++;
    46          info.maxLength++;
    47          return next.study(info);
    48      }
    49  }
    50  
    51
as2api